Crude Oil, also known as petroleum, is a naturally occurring, unrefined petroleum product composed of hydrocarbon deposits and other organic materials. It appears as a thick, black, or dark brown liquid. Crude oil is extracted from the earth through oil drilling and is the raw material used in the refining process to produce various fuels, including gasoline, diesel, and jet fuel, as well as other chemical products. Crude oil serves as the foundational input for the petroleum industry and is processed in refineries to separate and transform it into usable products.